Introducing TrailFit.


The San Diego Trailfit program is funded and supported by San Diego Ultra Running Friends (SURF) and greater San Diego ultra race directors. SD Trailfit works closely with the US Forest Service (Cleveland National Park) and the California State Parks to maintain most of the trails used in the San Diego Ultra Slam.

The San Diego 100 requires all entrants to complete 6-hours of volunteer service towards trail maintenance or by volunteering at a running/community event. Greater San Diego area participants are expected to satisfy this requirement with SD Trailfit since they will be running on the trails we support and use. Information and work dates are posted on SD Trailfit web site at:


Sales for a 2019 free entry to San Diego 100 and numerous other Sponsor Giveaway Gifts to be selected at this year's pre-race briefing. Proceeds support San Diego Trailfit. Raffle tickets are $5 each or 5 tickets for $20.

Our Sponsors

  • Altra Running Footwear
  • Black Diamond
  • Clif Bar
  • Dirty Girl Gaiters
  • Foot Kinetics
  • High Desert Drop Bags
  • Injinji
  • Julbo Eyewear
  • Movin Shoes
  • Orangemud
  • Patagonia
  • Pulse
  • Running Skirts
  • SD Ultra Running Friends (SURF)
  • SoCal Ultra Series
  • Squirrel's Nut Butter
  • Tailwind Nutrition
  • Ultra Running Magazine
  • Ultra Trail Du Mont Blanc
  • Ultralive.Net
  • Western States
Race Pictures By:
Howie Stern Photos
© 2018 San Diego 100